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The major risk factor for chronic bronchitis is a. previous allergies. b. cigarette smoking. c. dust in the air. d. family history.

The major risk factor for chronic bronchitis is a. previous allergies. b. cigarette smoking. c. dust in the air. d. family history.
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the major risk factor for chronic bronchitis is a. previous allergies. b. cigarette smoking. c. dust in the air. d. family history.

User Muhammad Naufil
by
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2 Answers

5 votes

The answer is A, have a nice day.

User Melchiar
by
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The major risk factor for chronic bronchitis is a/
b. cigarette

User Ramkee
by
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